Answer:
254 cm^2
Step-by-step explanation:
18/2 = radius = 9
9^2(Pi) = 254 cm^2
Answer:
x = 25°
m∠B = 65°
m∠C = 50°
Step-by-step explanation:
We know that a triangle's angles will be equal to 180;
65° + (3x - 10)° + (2x)° = 180°
3x° + 2x° - 10° = 115°
5x° = 125°
x = 25°
Now we can plug our x value into the expressions for ∠B and ∠C;
[B] 3x° - 10° becomes 3(25)° - 10° = 75° - 10 = 65°
[C] 2x° becomes 2(25)° = 50°
We can also check our work;
65° + 65° = 130°
130° + 50° = 180°
Have a nice day!
I hope this is what you are looking for, but if not - comment! I will edit and update my answer accordingly.
- Heather
9514 1404 393
Answer:
B) -3
Step-by-step explanation:
There are methods for finding only c. Cramer's rule is one of them. It involves finding two determinants and taking their ratio. Here, we choose a more <em>ad hoc</em> approach. It appears that the value of b can be found by combining the last two equations.
(1/2)(2a +4b -2c) -(a -3b -c) = (1/2)(12) -(-4)
5b = 10
b = 2
Now, we can substitute this value into the first two equations. This gives ...
5a +c = -8
a - c = 2
Subtracting 5 times the second from the first gives ...
(5a +c) -5(a -c) = (-8) -5(2)
6c = -18 . . . . simplify
c = -3 . . . . . . divide by 6
The value of c is -3.
Answer:
Step-by-step explanation:
42 to 36 = 42 : 36
= 
( as a fraction ) ← divide numerator/ denominator by 7
= ← in simplest form
